Additional Information: Please refrain from price negotiations as this item is also listed on other sites. Thank you very much for viewing. This is a listing for the Luminox Audio RUBEUS LNA-RUB-CM2P-31 Mini Plug / 2.5mm (4-pole) / 4.4mm Balanced (5-pole) ⇔ 2-pin [1.2m]. This is a domestic genuine product purchased this year, brand new and unopened. It is still in its shrink wrap. I have decided to sell it as I will not be using it. Free shipping nationwide. I will pack it with bubble wrap and ship it via Takkyubin Compact. In the unlikely event of an initial defect, please contact the manufacturer directly. Returns and refunds are not accepted to prevent product substitution. Thank you for your consideration. RUBEUS Enhances the mid-range to mid-low frequencies for a dynamic sound. The "RUBEUS" uses an 8-core structure with ultra-high purity 6N OCC (single crystal oxygen-free copper) wire and high-purity 4N silver-plated copper wire. It enhances the vocal range to mid-low frequencies, resulting in a rich and dynamic sound quality, and changes the overall transparency and spacious sound field. Each wire material is "Lumi Flex™ processed" to significantly reduce impedance, enabling optimal current transmission while suppressing degradation caused by ultraviolet rays. In addition, it ensures the flexible handling that is characteristic of Luminox Audio. The plug section uses an L-shaped 3-in-1 multi-plug that allows easy switching between 3.5mm unbalanced and 2.5mm/4.4mm balanced connections. Furthermore, it achieves even higher purity transmission with its unique Pair Balancing Technology. Luminox Audio Earphones Earphone Re-cabling